| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Fatigue in Materials: Fundamentals, Multiscale Characterizations and Computational Modeling
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| Presentation Title |
Fatigue Crack Growth of Welded Steel Gusset Plate Joints by X-Ray Microtomography |
| Author(s) |
Poonchezhian Vishnu Prakash, Eshan Ganju, Nikhilesh Chawla, Koji Kinoshita, Yuki Banno, Shohei Yamada, Mototaka Saeki, Yoshihiro Watanabe , Mark Gruninger |
| On-Site Speaker (Planned) |
Poonchezhian Vishnu Prakash |
| Abstract Scope |
Gusset plates are essential for connecting structural elements in bridges, but they are prone to fatigue crack growth due to cyclic loading. In this study, we have investigated the effectiveness of various peening treatments—un-peened, shot-peening, needle-peening, and shot-peened and grit blasting—in enhancing the fatigue life of welded gusset joints. Cruciform welded gusset plates were fabricated using A572 structural steel and subjected to stress-controlled fatigue tests. To examine the fatigue crack growth, interrupted fatigue experiments and non-destructive x-ray Computed Tomography (XCT) were employed. The 3D XCT data was analyzed in tandem with cycling loading data to elucidate the impact of crack growth on welded gusset joint stiffness. The study revealed a substantial improvement in fatigue life for peened samples compared to un-peened ones, with varying degrees of impact on crack initiation depending on the peening process. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Iron and Steel, Surface Modification and Coatings, Characterization |